Question

The most important statement about the city of Constantinople is that

Answer 1

not only was it fortified, but by looking at a map of the area
http://upload.wikimedia.org/wikipedia/en...

You can tell that it was right in the middle of a trade route from Europe to the middle east and Asia. The land mass where it was parked on, was the shortest body of water to cross, and thus important for the land caravans to and from the area. whoever controlled this spot, controlled goods coming and going.